/*******************************************************************************
 * The MOSES project, model based software engineering of networked embedded systems.
 * 
 * Copyright (C) 2010-2013, University of Applied Sciences Wildau,
 * Telematics Research Group, http://www.tm.th-wildau.de/research-group
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses>.
 * 
 * Contributors:
 *     University of Applied Sciences Wildau - initial API and implementation
 * 
 * If you are interested in a commercial license please contact us via 
 * e-mail: ralf.vandenhouten@th-wildau.de.
 ******************************************************************************/
package de.thwildau.tm.moses.abnf.generator.model.impl;

import de.thwildau.tm.moses.abnf.generator.model.AbnfElementField;
import de.thwildau.tm.moses.abnf.generator.model.AbnfRepeat;
import de.thwildau.tm.moses.abnf.generator.model.AbnfRuleClass;
 

/**
 * TODO Comment
 *
 * @author Thomas Kistel
 * @version $Revision$
 */
public abstract class AbnfElementFieldImpl implements AbnfElementField {

    private AbnfRepeat repeat;
    private AbnfRuleClass abnfRuleClass;
    
    protected AbnfElementFieldImpl(AbnfRepeat repeat) {
        this.repeat = repeat;
    }
    
    /* (non-Javadoc)
     * @see de.thwildau.tm.moses.abnf.generator.model.IAbnfElementField#getRepeat()
     */
    @Override
    public AbnfRepeat getRepeat() {
        return repeat;
    }
    
    /**
     * Sets the cross-reference to the {@link AbnfRuleClassImpl}. This method must be invoked
     * by the {@link AbnfRuleClassImpl#add(AbnfElementFieldImpl)} method only.
     * 
     * @param abnfRuleClass the {@link AbnfRuleClassImpl} cross-reference
     */
    /* package */ final void setAbnfRuleClass(AbnfRuleClass abnfRuleClass) {
        this.abnfRuleClass = abnfRuleClass;
    }
    
    /* (non-Javadoc)
     * @see de.thwildau.tm.moses.abnf.generator.model.IAbnfElementField#getAbnfRuleClass()
     */
    @Override
    public final AbnfRuleClass getAbnfRuleClass() {
        return abnfRuleClass;
    }
    
    @SuppressWarnings("unchecked")
    public <T extends AbnfElementField> T toSubtype(Class<T> clazz) {
        if(getClass().isAssignableFrom(clazz))
            return (T) this;
        return null;
    }
}
